Sink



FIG. 1 is a perspective view of the sink from above;

FIG. 2 is a top plan view of the sink;

FIG. 3 is a bottom plan view of the sink;

FIG. 4 is a front view of the sink;

FIG. 5 is a rear view of the sink;

FIG. 6 is a side view of the sink from the right side; and,

FIG. 7 is a side view of the sink from the left side. 

The ornamental design for a “sink,” as shown and described. 